Grid-tied string inverters
40 kW Commercial String Inverter
MODEL REFERENCESUN-40K-G04
- AC output
- 40 kW
- Max. PV input
- 52 kW
- MPPT trackers
- 3
G04 family view shared by the 40 / 50 kW configurations.

SUN-18–25K-G05 family view; 20 kW configuration.
Supplier-reference photography. Confirm the final equipment appearance and included accessories with your quotation.
Technical reference SUN-20K-G05
A compact three-phase string inverter for smaller commercial rooftop arrays. Use its two trackers to organize the array layout, with grid-tied production rather than outage backup as the primary purpose.
Configuration, availability, certification scope and commercial terms are confirmed at quotation.
Values below follow the referenced model or explicitly stated model family. Review the final datasheet, rated conditions and supply scope before procurement.
Deye — official Grid-tied string inverters technical reference
Reference model: SUN-20K-G05
Reviewed: 2026-10-15
Uses the technical table's 98.5% value rather than the page's broader marketing maximum. Dimensions exclude connectors and brackets.
| Rated AC output | 20 kW |
|---|---|
| Max. AC apparent power | 22 kVA |
| Nominal AC voltage | 220 / 380 V or 230 / 400 V |
| Grid frequency | 50 / 60 Hz |
| Max. PV input power | 26 kW |
| Max. PV input voltage | 1,100 V |
| MPPT voltage range | 200–1,000 V |
| MPPT / strings per tracker | 2 / 2+2 |
| Max. conversion efficiency | 98.5% |
| Ingress protection | IP65 |
| Dimensions (W × H × D) | 362 × 527 × 220 mm |
| Weight | 20 kg |
| Communication | RS485 / RS232 |
Published reference values are not a substitute for the final selected-model datasheet and project design.
The complete system must account for site loads, electrical interfaces, environmental limits and local installation requirements.
Explore the planning guideShare your country, quantity, electrical requirements, installation environment and delivery plan. Ask for the final datasheet and supply scope for this reference.